Charging unit



FIG. 1 is a perspective view of a charging unit;

FIG. 2 is a top elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom elevational view thereof; and,

FIG. 6 is a back elevational view thereof.

The broken lines in the drawings are understood to be for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a charging unit, as shown and described. 